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Simplify newDepth modification formulas

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Passed STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 21856 W: 5709 L: 5471 D: 10676
Ptnml(0-2): 77, 2466, 5589, 2734, 62
https://tests.stockfishchess.org/tests/view/68862ea4966ed85face24a27

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 108828 W: 27893 L: 27763 D: 53172
Ptnml(0-2): 59, 11860, 30435, 12012, 48
https://tests.stockfishchess.org/tests/view/68863046966ed85face24a3b

closes https://github.com/official-stockfish/Stockfish/pull/6181

Bench: 3069051
This commit is contained in:
FauziAkram
2025-07-28 20:03:05 +02:00
committed by Joost VandeVondele
parent 2e2d2778fc
commit a9b7638e96
1 changed files with 1 additions and 3 deletions
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src/search.cpp
+1 -3
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@@ -1229,7 +1229,7 @@ moves_loop: // When in check, search starts here
// Do a full-depth search when reduced LMR search fails high // Do a full-depth search when reduced LMR search fails high
// (*Scaler) Usually doing more shallower searches // (*Scaler) Usually doing more shallower searches
// doesn't scale well to longer TCs // doesn't scale well to longer TCs
if (value > alpha && d < newDepth) if (value > alpha)
{ {
// Adjust full-depth search based on LMR results - if the result was // Adjust full-depth search based on LMR results - if the result was
// good enough search deeper, if it was bad enough search shallower. // good enough search deeper, if it was bad enough search shallower.
@@ -1244,8 +1244,6 @@ moves_loop: // When in check, search starts here
// Post LMR continuation history updates // Post LMR continuation history updates
update_continuation_histories(ss, movedPiece, move.to_sq(), 1412); update_continuation_histories(ss, movedPiece, move.to_sq(), 1412);
} }
else if (value > alpha && value < bestValue + 9)
newDepth--;
} }
// Step 18. Full-depth search when LMR is skipped // Step 18. Full-depth search when LMR is skipped